Fix macOS sidebar traffic light spacer: native titlebar guard + RTL locale support - #298678
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Benjamin Christopher Simmonds (benibenj)
March 2, 2026 10:28
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…veTitlebar call Co-authored-by: benibenj <44439583+benibenj@users.noreply.github.com>
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[WIP] Fix macOS sidebar traffic light spacer rendering with custom titlebar
Fix macOS sidebar traffic light spacer: native titlebar guard + RTL locale support
Mar 2, 2026
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The Agent Sessions sidebar always rendered a 70px traffic light spacer on macOS, even when the OS was drawing native titlebar/traffic lights (causing double spacing). It also didn't account for RTL locales where macOS moves traffic lights to the right.
!hasNativeTitlebar(this.configurationService)— spacer only appears with custom titlebarhasNativeTitlebar()call (it falls back togetTitleBarStyleinternally), drop unused importTitlebarPart'sprimaryWindowControlsLocationlogic viasafeIntl.Locale(platformLocale).textInfo.direction— spacer only added when traffic lights are on the left (LTR)LAYOUT.mddocs and changelog✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.